Improvement in plumbers  water-boilers



n A. R. RoBB. Improvement in Plumbers' Water-Boilers. No. 114.347.

Patented May 2 y lnuii hm ALEXANDER R. ROBB, 0F BROOKLYN, NEW YORIQ Letters Patent No. 114,347,11atednay 2, 1871.

IMPROVEMENT IN PLUMBERS WATER-BOILERS.

To all whom it may conce/ru Be it known that I, ALEXANDER R. ROBB, of Brooklyn, in the State of New York. have invented certain Improvements in Plnmbe'rs Water-Boilers, of which the following is a specification.

The accompanying drawing shows a section of a water-boiler embodying my invent-ion.

My invention consists in the attachment of the inlet water-pipe to the inside of the boiler, reaching some distance below the opening of the hot-water pipe, and arranging in said pipe a-check or non-return valve.

Further, inthe arrangement of'suitable small openings, communicating with the inlet water-pipe, for the vescape of anysteam which may generate in the waterboiler.

A represents a plumbers water-boiler, made in the usual form, with a pipe, B, at the bottom leading to the range and the return hot-water pipe O ou the side.

D is the outlet-pipe leading to the wash-tubs and different parts ofthe building. l l

E is a chamber attached to the top of the boiler, on the upper end of which the pipe F is coupled, th'rough which the cold water is brought into the boiler.

To the bottom of this chamber E a pipe, G, is screwed or fastened, projecting downward some little distance below the hot-water pipe C.

Into the chamber E a valve-box, H, is placed, provided with a valve, J, and communicating with the inlet-pipe F.

N ear the top of the chamber E, in the inside of the boiler A, a small hole,'fm is made, and a correspond- The Schedule referred to in these Letters Patent and making part: of the same.

ing hole, 11is made near the upper end, above the valve J in the valve-box H.

The water coming through the pipe F enters the valve-box H and passes through the valve J intothe chamber E, and down the ypipe G into the boiler A. The arrangement of the valve J prevents any back iiow ofthe water, as the pipes G and F would form a Siphon when the lower part of the pipe F is situated much below the bottom of the boiler, whereby a vac` num would be produced in the boiler, which might cause the same to collapse.

To prevent any explosion of thevboiler, in case steam would be generated in the sama-the holes m and n are arranged, whereby a communication is formed between the upper part of the boiler and the inlet-pipe F for the escape of the generated steam.

What I claim as my invention, and desire to secure by Letters Patent, is`

1. The arrangement of the valve-box Hland valve J in the inlet-pipe F of a plumbers water-boiler, substantially'f in the manner and for the purpose described.

2. The arrangement of the holcs m and n, substantially as and for the purpose hereinbefore set forth.

3. In combination with the inlet-pipe F, the valvebox H provided with a Valve, J, the chamber E and pipe G, arranged as a plumbers water-boiler, substan tially as and for the purpose specied.

' ALEXANDER R. ROBB.

Witnesses:

HENRY E. ROEDER, JOHN CHRISTIAN. 

